Blender 2.8 crashing after starting render
Found what was going on. Needed to bake the animations for each of the particles systems.

I am unsure if this is something you are supposed to do when using particle systems, but I had not baked any of them to memory, and considering the render had worked before with fewer systems, I figured it wouldn't be necessary. Ran the render after baking each of them and it worked as expected.